public class Example22 {
    public static void main(String[] args) {
        int[]arr;
        arr = new int[3];
        System.out.println("arr[0]=" +arr[0]);
        System.out.println("arr[1]=" +arr[1]);
        System.out.println("arr[2]=" +arr[2]);
        System.out.println("数组的长度是：" +arr.length);
    }
}
